Objective: To investigate the factors that affect the effective content in Diascorea zingiherersis and control its quality of D. zingiberensis. Method: According to the method in the Chinese Pharmacopoeia(edition 2010)

the water determination was adopted.The content of diosgenin was determined by HPLC. On the basis

the relation of diosgenin content with some factors were analysied

such as resh samples water content

different growth years

different producing areas and different growth soil. Result: The results showed that diosgenin content of D. zingiberensis planted in the sandy landwas relatively high

and generally

the diosgenin content reached the maximum after growth in 3-5 years

the content of diosgenin showed positive linear correlation with water content

but the content diosgenin of D. zingiberensis in three producing areas had little difference. Conclusion: These data provide the reference for standardized planting of D. zingiberensis.